CN213628507U - Novel steel retainer linear bearing - Google Patents

Abstract

The utility model provides a novel steel holder linear bearing belongs to the technical field of bearing. A novel steel retainer linear bearing comprises an outer sleeve, a retainer ring, a sealing element, a gasket, a leaning ring and balls; the utility model discloses an all be provided with the gasket between the tip at the both ends of holder and the inner wall of overcoat, when making the holder compressed tightly by the rand, adaptive deformation can take place for the gasket, thereby eliminate the fit-up gap that leads to because of machining precision scheduling problem between the tip of holder and the inner wall of overcoat, and simultaneously, be provided with between the tip at the both ends of holder and the sealing member that corresponds and support the ring, when making to exert pressure to the holder at the sealing member, support and take place adaptive deformation to the ring, the pressure of sealing member to the holder tip has been increased, thereby the wearing and tearing that have prevented to take place relative movement between steel holder and the overcoat inner wall and lead to and the poor problem of stability, linear bearing's performance has been promoted, service life has been prolonged.

Description

Novel steel retainer linear bearing

Technical Field

The utility model relates to a technical field of bearing specifically relates to a novel steel holder linear bearing.

Background

At present, most holders of linear bearings on the market are made of polymers, such as polyformaldehyde, and although the holders can meet the use requirements in general environments, the structural strength of the holders still has defects, and after the holders are used for a long time, the holders are seriously worn and are easy to deform, so that the linear bearings cannot be used. Although there is a linear bearing using a steel cage, in the conventional linear bearing using a steel cage, the ground of the steel retainer is directly contacted with the inner wall of the jacket, and the steel retainer is pressed on the inner wall of the jacket through the clamping ring, and, for the convenience of installation, there is an assembly gap between the steel cage and the inner wall of the outer sleeve, and, due to the influence of machining errors, even when the clamping ring presses the steel retainer tightly, the steel retainer is difficult to deform in an adaptive manner, so that a gap still exists between the steel retainer and the inner wall of the outer sleeve, and simultaneously, the sealing elements are pressed at both ends of the steel retainer, so that the pressure of the sealing elements to the end part of the steel retainer is smaller, therefore, when the linear bearing is used, the steel retainer can move relative to the outer sleeve, so that the problems of larger abrasion and influence on the movement stability of the linear bearing are caused.

Disclosure of Invention

In view of the above problems in the prior art, it is an object of the present invention to provide a novel steel cage linear bearing, in which a spacer is disposed between an inner wall of an outer sleeve and a steel cage, meanwhile, two ends of the steel retainer are respectively sleeved with a leaning ring, so that when the retainer ring presses the steel retainer on the inner wall of the outer sleeve, the gasket can generate adaptive deformation, so that the gasket can eliminate the assembly clearance between the steel retainer and the inner wall of the outer sleeve caused by factors such as machining errors and the like, meanwhile, the abutting rings sleeved at the two ends of the steel retainer are abutted against the sealing element to increase the pressure of the sealing element on the end part of the steel retainer, therefore, the steel retainer is more stably arranged in the outer sleeve, the problems of abrasion and poor stability caused by relative movement of the steel retainer in the outer sleeve in the using process are solved, the use performance of the linear bearing is better improved, and the service life of the linear bearing is prolonged.

The specific technical scheme is as follows:

a new steel cage linear bearing having the features comprising:

the outer sleeve is arranged in a cylindrical shape, a plurality of bosses protruding towards the inner cavity of the outer sleeve are arranged on the inner wall of the outer sleeve along the axial direction of the outer sleeve, a circle of first caulking grooves are respectively arranged on the inner wall of the outer sleeve and positioned at two ends of the bosses, and a circle of second caulking grooves are arranged on the inner walls of the two ends of the outer sleeve and positioned at one sides, away from each other, of the two first caulking grooves;

the holder is provided with a cavity, a cavity opening of the holder is arranged towards one side of the inner wall of the outer sleeve, the boss corresponding to the holder is positioned in the cavity of the holder, meanwhile, a rolling groove communicated with the inner cavity of the outer sleeve is arranged on the cavity bottom of one side of the cavity of the holder, the boss in the cavity of the holder corresponds to the rolling groove on the cavity bottom of the cavity, and a third caulking groove corresponding to the first caulking groove is formed at two bent ends of the holder and one side of the bent ends of the holder, which is close to the inner wall of the outer sleeve;

the clamping rings are positioned at two ends of the outer sleeve and are arranged in an annular shape, the clamping rings positioned at the two ends of the outer sleeve are respectively arranged at the end parts of the two bent ends of each retainer, and the clamping rings are positioned at one side of the retainer, which is deviated from the inner wall of the outer sleeve, and press the end parts of each retainer;

the sealing elements are annularly arranged and arranged at two ends of the inner cavity of the outer sleeve, and the sealing elements are clamped in the second caulking grooves at the two ends of the outer sleeve and tightly abut against the end parts at the two ends of the retainer;

the gasket is arranged in the first caulking groove and tightly propped against the end part of the retainer;

and the abutting rings are arranged between the end parts of the two ends of each retainer and the corresponding sealing parts.

The ball is arranged in the concave cavity of each retainer and can roll in the concave cavity, and one side of the ball extends into the inner cavity of the outer sleeve from the rolling groove of the concave cavity.

The utility model provides a foretell novel steel holder linear bearing, wherein, all be provided with the step in the opening at overcoat both ends, the aperture that is provided with the region of boss and holder in the inner chamber of overcoat is less than the open-ended aperture of the inner chamber of overcoat, first caulking groove is located the region that the inner chamber aperture of overcoat is little, the second caulking groove is located the big region in inner chamber aperture of overcoat, and simultaneously, the fourth caulking groove has been seted up to one side that just is located to be close to being provided with the holder on the step, and the fourth caulking groove is located between first caulking groove and the second caulking groove, and, one side that the fourth caulking groove is close to the second caulking groove forms the opening on the step, one side of leaning on the ring inlays and locates in the fourth caulking groove.

The novel steel retainer linear bearing is characterized in that clamping holes are formed in the end portions of the two ends of each retainer, positioning blocks corresponding to the clamping holes in the two ends of the retainer are arranged in the inner cavity of the outer sleeve and in the area with the small aperture, the positioning blocks extend inwards from the step of the end of the outer sleeve along the axial direction of the outer sleeve, and one positioning block corresponds to one clamping hole of the retainer.

In the novel steel retainer linear bearing, one end of each positioning block, which extends inwards, is located between the first caulking groove and the fourth caulking groove, and the two third caulking grooves on each retainer are respectively located on one side where the two clamping holes are close to each other.

The novel steel retainer linear bearing is characterized in that the abutting rings are provided with a plurality of abutting rings, and the end parts of the two ends of each retainer, which are positioned at the two sides of the clamping hole, are provided with the abutting rings.

The novel steel retainer linear bearing is characterized in that the cross section of the abutting ring is arranged in a U shape, the notch of the abutting ring is arranged towards one side of the end part of the retainer, and the end part of the retainer extends into the notch of the abutting ring.

Foretell novel steel holder linear bearing, wherein, the both ends of boss all are the inclined plane setting, and the longitudinal section shape of boss is isosceles trapezoid and sets up.

According to the novel steel retainer linear bearing, a first channel is formed in the space between the boss and the rolling groove, a second channel is formed between the side, which is not provided with the rolling groove, in the cavity of the retainer and the inner wall of the outer sleeve, the length of the boss is smaller than that of the cavity of the retainer, a third channel is formed between the two ends of the boss and the cavity of the retainer, and meanwhile the two ends of the first channel and the second channel are communicated through the third channel to form the circulating groove.

In the novel steel cage linear bearing, the balls are arranged in the circulating grooves and roll in the circulating grooves in a circulating mode.

The positive effects of the technical scheme are as follows:

the novel steel retainer linear bearing is characterized in that gaskets are arranged between the end parts of the two ends of each retainer and the inner wall of the outer sleeve, the gasket can generate adaptive deformation, the assembly clearance caused by the problems of processing precision and the like when the retainer is pressed by the clamping ring is eliminated, so that when the retainer is pressed tightly on the inner wall of the jacket by the retainer ring, and simultaneously, the two ends of each retainer are provided with the abutting rings, when the retainer is confined in the inner cavity of the outer sleeve by the seal, the seal compresses the retainer against the ring, so that the pressure of the seal against the end of the steel retainer is increased, thereby make the steel holder more stable install in the overcoat, prevent to take place relative movement and the wearing and tearing that lead to and the poor problem of stability between the inner wall of steel holder and overcoat in the use, promoted linear bearing's performance, prolonged linear bearing's life.

Drawings

Fig. 1 is a partial cross-sectional view from a perspective of an embodiment of a novel steel cage linear bearing of the present invention;

fig. 2 is a partial cross-sectional view from another perspective of an embodiment of a novel steel cage linear bearing of the present invention;

FIG. 3 is a partial cross-sectional view of an outer cover in accordance with a preferred embodiment of the present invention;

FIG. 4 is a perspective view of the outer cover according to a preferred embodiment of the present invention;

FIG. 5 is a diagram of a retainer according to a preferred embodiment of the present invention;

fig. 6 is a structural diagram of a support ring according to a preferred embodiment of the present invention.

In the drawings: 1. a jacket; 11. a boss; 12. a first caulking groove; 13. a second caulking groove; 14. a step; 15. Positioning blocks; 141. a fourth caulking groove; 2. a holder; 21. a concave cavity; 22. a rolling groove; 23. a third caulking groove; 24. a clamping hole; 211. a first channel; 212. a second channel; 213. a third channel; 3. a collar; 4. A seal member; 5. a gasket; 6. an abutment ring; 7. and a ball.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically described with reference to fig. 1 to 6, but the following contents are not intended to limit the present invention.

Fig. 1 is a partial cross-sectional view from a perspective of an embodiment of a novel steel cage linear bearing of the present invention; fig. 2 is a partial cross-sectional view from another perspective of an embodiment of a novel steel cage linear bearing of the present invention. As shown in fig. 1 and fig. 2, the present embodiment provides a novel steel cage linear bearing, including: the outer sleeve 1, the retainer 2, the collar 3, the seal 4, the gasket 5, the abutment ring 6 and the balls 7.

FIG. 3 is a partial cross-sectional view of an outer cover in accordance with a preferred embodiment of the present invention; fig. 4 is a view of a perspective of the jacket according to a preferred embodiment of the present invention. As shown in fig. 1 to 4, the outer sleeve 1 is cylindrical, and a plurality of bosses 11 protruding toward the inner cavity of the outer sleeve 1 are arranged on the inner wall of the outer sleeve 1 along the axial direction, so that a structure with a height difference is formed on the inner wall of the inner cavity of the outer sleeve 1, that is, the bosses 11 provide a structural basis for subsequently forming a circulation groove for rolling the balls 7. And, just be located the both ends of boss 11 on the inner wall of overcoat 1 and be provided with the first caulking groove 12 of round respectively, through the first caulking groove 12 that both ends set up, for follow-up gasket 5 installation on overcoat 1 provides the space, also restrict the removal of follow-up relevant gasket 5 simultaneously for the adaptability deformation scope that gasket 5 took place is limited in first caulking groove 12, can avoid influencing the installation of other structures, still provides the condition for gasket 5 eliminates the fit-up gap between the inner wall of overcoat 1 and holder 2. Simultaneously, just be located one side that two first caulking grooves 12 deviate from each other and seted up round second caulking groove 13 on the inner wall at the both ends of overcoat 1, through the arrangement of the second caulking groove 13 at overcoat 1 both ends for follow-up sealing member 4 of holding frame 2 in the inner chamber of tight overcoat 1 of supporting can be blocked by second caulking groove 13, has realized the joint installation of sealing member 4 on overcoat 1, easy dismounting, and also provides stable installation basis for sealing member 4.

Fig. 5 is a structural diagram of a retainer according to a preferred embodiment of the present invention. As shown in fig. 1 to 5, the plurality of retainers 2 are arranged, and the plurality of retainers 2 are made of steel, so that the structural strength of the retainers 2 is improved, the stability is higher, and the service life is longer. In addition, a plurality of retainers 2 are distributed in the inner cavity of the outer sleeve 1 in an annular array mode, so that the uniform distribution of the retainers 2 in the inner cavity of the outer sleeve 1 is guaranteed, meanwhile, one retainer 2 corresponds to one boss 11, the follow-up retainers 2 can form circulation grooves with the corresponding bosses 11, and the reasonability of the movement tracks of the follow-up balls 7 in the circulation grooves is guaranteed. And both ends of each retainer 2 are bent towards one side of the inner wall of the outer sleeve 1, so that the retainer 2 is in a cap-shaped structure in cross section, and the retainer 2 is provided with a cavity 21, at the moment, the cavity 21 can be formed by stamping the retainer 2, and the opening of the cavity 21 of the retainer 2 is arranged towards one side of the inner wall of the outer sleeve 1, namely, the opening of the cavity 21 of the retainer 2 is sealed by the inner wall of the outer sleeve 1, so that the subsequent balls 7 are ensured to roll stably in a circulating groove formed by the retainer 2 and the boss 11. And, the boss 11 corresponding to retainer 2 locates in cavity 21 of this retainer 2, have improved the condition for subsequent boss 11 and retainer 2 form the circulation groove that the ball 7 rolls, meanwhile, there are rolling grooves 22 communicating the cavity of overcoat 1 on the cavity bottom of one side of cavity 21 of retainer 2, and the boss 11 in cavity 21 of a retainer 2 corresponds to rolling groove 22 on the cavity bottom of this cavity 21, namely after the ball 7 rolls on the boss 11, the ball 7 deflects to the rolling groove 22 side of the retainer 2, make one side of the ball 7 stretch into the cavity of the overcoat 1 from rolling the groove 22, offer the structural foundation for subsequent ball 7 contacts the mating shaft-like structure inserted into this linear bearing. And, the third caulking groove 23 that corresponds with first caulking groove 12 is seted up at the both ends that the holder 2 is buckled and be located the one side that is close to the inner wall of overcoat 1 for after holder 2 installs in the inner chamber in overcoat 1, third caulking groove 23 on the holder 2 and first caulking groove 12 in the overcoat 1 can form an avoidance space, thereby for setting up the gasket 5 between overcoat 1 and holder 2 and having provided the installation space, make the outside of gasket 5 embed in first caulking groove 12, the inboard of gasket 5 is embedded in third caulking groove 23, the stability and the reliability of gasket 5 mounted position on overcoat 1 and holder 2 have been guaranteed, thereby make the stability of holder 2 installation in overcoat 1 higher.

Specifically, rand 3 is located the both ends of overcoat 1, and at this moment, rand 3 is the annular setting, has made things convenient for and has inserted the space that a plurality of holders 2 enclose after passing rand 3 with linear bearing complex axle column structure. And, the rand 3 that is located overcoat 1 both ends sets up respectively in the tip at the both ends that each holder 2 buckles, two rands 3 act on respectively on the tip at the both ends of each holder 2 promptly, the removal of rand 3 ball 7 in to the cavity 21 of holder 2 has been avoided causing the interference, and simultaneously, rand 3 is located one side that holder 2 deviates from overcoat 1 inner wall, and compress tightly the tip of each holder 2, rand 3 compresses tightly the tip of holder 2 towards one side of overcoat 1's inner wall promptly, make holder 2 can stable installation on the inner wall of overcoat 1, space and direction have been provided for ball 7's removal, structural design is more reasonable.

Specifically, two sealing elements 4 are arranged, and the two sealing elements 4 are arranged in an annular manner, so that the shaft-shaped structure matched with the linear bearing can be inserted into a space surrounded by the plurality of retainers 2 after penetrating through the sealing elements 4. At this time, the two sealing elements 4 are respectively arranged at the two ends of the inner cavity of the outer sleeve 1, so that the space between the two ends of the outer sleeve 1 and the two ends of the retainer 2 is sealed, and the problem that the outer sleeve 1, the retainer 2 and the balls 7 are abraded in an accelerated manner after impurities such as dust enter is solved. And, sealing member 4 card is located in the second caulking groove 13 at overcoat 1 both ends and is supported the tip at tight holder 2 both ends, has realized that the joint of sealing member 4 on overcoat 1 is connected, easy dismounting also makes second caulking groove 13 can regard as the limit structure of sealing member 4 simultaneously, and the position of restriction sealing member 4 on overcoat 1 provides the condition for sealing member 4 supports the both ends of tight holder 2.

Specifically, be provided with gasket 5 in the first caulking groove 12 of overcoat 1, and gasket 5 supports tightly on the tip of holder 2, all be provided with gasket 5 in two first caulking grooves 12 of overcoat 1 promptly, and two gaskets 5 support the tip at the both ends of holder 2 respectively, this moment, rand 3 and gasket 5 are located the inside and outside both sides of the tip of holder 2 respectively, make when the inboard of the tip of holder 2 is compressed tightly to rand 3, holder 2 extrudes gasket 5, make gasket 5 take place the deformation of adaptability, thereby eliminate the fit-up gap between the inner wall of holder 2 and overcoat 1, the stability of holder 2 installation in overcoat 1 has been improved, reduce the easy wear problem that leads to because of joining in marriage clearance problem etc., structural design is more reasonable, the safety guarantee nature is higher. Preferably, the gasket 5 is made of rubber, so that the manufacturing cost is low, the toughness is good, the deformability is strong, and the using requirements are better met.

Fig. 6 is a structural diagram of a support ring according to a preferred embodiment of the present invention. As shown in fig. 1 and 6, the abutting ring 6 is disposed between the end portions of the two ends of each holder 2 and the corresponding sealing member 4, one side of the abutting ring 6 abuts against the end portion of the holder 2, the other side of the abutting ring 6 abuts against the sealing member 4 matched with the end portion of the holder 2, so that the abutting ring 6 serves as an intermediate structure between the sealing member 4 and the end portion of the holder 2, when the sealing member 4 abuts against the end portion of the holder 2, the sealing member 4 applies pressure to one side of the holder 2, at this time, the sealing member 4 acts on the abutting ring 6, the abutting ring 6 further applies pressure to the holder 2, and also by the abutting ring 6 being deformed adaptively, the assembly gap between the sealing member 4 and the end portion of the holder 2 is eliminated, the problem of abrasion caused by the movement of the holder 2 along the axial direction of the outer sleeve 1 during use is prevented, and the stability of the holder 2 installed in the outer sleeve 1 is further improved, structural design is more reasonable, and the safety guarantee nature is higher. Preferably, lean on ring 6 to be the rubber material, the cost of manufacture is low, and toughness is good, and deformability is strong, the better user demand that has satisfied.

Specifically, all be provided with a plurality of balls 7 in the cavity 21 of each holder 2, and, a plurality of balls 7 in each holder 2 all can roll in the cavity 21 that is located, and stretch into the inner chamber of overcoat 1 in the rolling groove 22 of cavity 21 that is located is followed to one side of ball 7, make the rolling in-process of ball 7, when ball 7 rolls to rolling groove 22, one side of ball 7 stretches into in the inner chamber of overcoat 1 and by in the space that a plurality of holders 2 enclose from rolling groove 22, thereby make ball 7 contact with linear bearing complex axle column structure, realize rolling contact, reduce frictional force, structural design is more reasonable.

More specifically, the openings at the two ends of the outer sleeve 1 are both provided with steps 14, the aperture of the area provided with the boss 11 and the retainer 2 in the inner cavity of the outer sleeve 1 is smaller than the aperture of the opening of the inner cavity of the outer sleeve 1, namely, the openings at the two ends of the outer sleeve 1 are both in a reaming structure, and an installation foundation is provided for the installation of the subsequent retainer 2 and the sealing element 4. At this time, the first caulking groove 12 is located in the area where the inner cavity aperture of the outer sleeve 1 is small, that is, the retainer 2 is arranged in the area where the inner cavity aperture of the outer sleeve 1 is small, the second caulking groove 13 is located in the area where the inner cavity aperture of the outer sleeve 1 is large, and the sealing member 4 is arranged in the area where the inner cavity aperture of the outer sleeve 1 is large, so that the installation of the sealing member 4 is facilitated, and a condition is provided for the sealing member 4 to compress the retainer 2. Meanwhile, a fourth caulking groove 141 is formed in the step 14 and located at a side close to the holder 2, and the fourth caulking groove 141 is located between the first caulking groove 12 and the second caulking groove 13, so that the fourth caulking groove 141 can contact with the end portion of the holder 2, and meanwhile, the fourth caulking groove 141 is prevented from interfering with the installation of the structures in the first caulking groove 12 and the second caulking groove 13. And, the fourth caulking groove 141 is close to the one side of second caulking groove 13 and forms the opening on step 14, lean on one side of ring 6 to inlay and locate in the fourth caulking groove 141, the fourth caulking groove 141 provides the dodge space for the installation that leans on ring 6, prevent to cause to lean on ring 6 to imbed the problem that causes in the clearance between the inner wall of overcoat 1 and holder 2 and the holder 2 can't be compressed tightly because of the installation that leans on ring 6, simultaneously, also make sealing member 4 can be located the opening part contact on step 14 from fourth caulking groove 141 and lean on ring 6, thereby for sealing member 4 compresses tightly holder 2 and provides the condition, structural design is more reasonable.

More specifically, card hole 24 has all been seted up to the tip at the both ends of each holder 2, and the locating piece 15 that just is located the card hole 24 correspondence at the regional both ends of aperture little in the inner chamber of overcoat 1 is provided with a plurality ofly and holder 2, and locating piece 15 all inwards extends from the step 14 department of place end along the axial of overcoat 1, and a locating piece 15 corresponds the card hole 24 of holder 2, make when holder 2 installs, holder 2's both ends can be restricted by the locating piece 15 at the both ends of overcoat 1's inner chamber, prevent that locating piece 15 from taking place to remove in axial or circumference, the stability of holder 2 installation on overcoat 1 has further been guaranteed, structural design is more reasonable.

More specifically, the one end that each locating piece 15 inwards extended all is located between first caulking groove 12 and the fourth caulking groove 141, and two third caulking grooves 23 on each holder 2 are located the one side that two calorie holes 24 are close to each other respectively, make locating piece 15 can not influence the arrangement of third caulking groove 23, prevented promptly that locating piece 15 from influencing the installation of gasket 5, make and be provided with the interval between locating piece 15 and the gasket 5, thereby make the better realization holder 2 of gasket 5 ability and the connection of overcoat 1, structural design is more reasonable.

More specifically, support and lean on ring 6 to be provided with a plurality of, the both ends of each holder 2 and the tip that is located the both sides of card hole 24 all are provided with one and support and lean on ring 6, can not exist in the card hole 24 of the tip of each holder 2 promptly and support ring 6, can avoid supporting ring 6 to cause the influence to the cooperation of card hole 24 and locating piece 15, still make sealing member 4 act on between the structure on holder 2 through supporting ring 6 can not blockked by locating piece 15, structural design is more reasonable.

More specifically, lean on ring 6 cross section to become "U" type setting, the notch that leans on ring 6 sets up towards holder 2's tip one side, and holder 2's tip stretches into in the notch that leans on ring 6, lean on ring 6 can block the tip of locating holder 2 promptly, made things convenient for promptly to lean on ring 6 to install on holder 2, simultaneously, still avoided in the installation to lean on ring 6 to fall from holder 2 and influence the problem of installation, structural design is more reasonable.

More specifically, the both ends of boss 11 all are the inclined plane setting, and the longitudinal section shape of boss 11 is isosceles trapezoid and sets up, has made things convenient for ball 7 to roll to boss 11 on or roll down from boss 11 on the inclined plane at boss 11 both ends to make the height of ball 7 in the inner chamber of overcoat 1 can change, stretch out to the inner chamber of overcoat 1 and provide the condition in the space that is enclosed by a plurality of holders 2 for one side of realizing ball 7.

More specifically, a first channel 211 is formed in a space between the boss 11 and the sliding groove, a second channel 212 is formed in the cavity 21 of the cage 2 and between the side where the rolling groove 22 is not provided and the inner wall of the outer sleeve 1, that is, the first channel 211 and the second channel 212 are parallel and spaced, the arrangement direction of the first channel 211 and the second channel 212 is consistent with the axial direction of the outer sleeve 1, but the heights of the first channel 211 and the second channel 212 from the inner wall of the outer sleeve 1 are different, so that the balls 7 in the first channel 211 can extend out of the space surrounded by the plurality of cages 2 and contact with a matched shaft-like structure, and the balls 7 in the second channel 212 only roll circularly, thereby providing conditions for the balls 7 in the cage 2 to adapt to linear reciprocating motion along the axial direction of the outer sleeve 1. Moreover, the length of the boss 11 is smaller than that of the cavity 21 of the retainer 2, a third channel 213 is formed between two ends of the boss 11 and the cavity 21 of the retainer 2, meanwhile, two ends of the first channel 211 and the second channel 212 are communicated through the third channel 213 and form a circulation groove, so that the balls 7 in the first channel 211 can enter the second channel 212 through the third channel 213, and the balls 7 in the second channel 212 can also enter the first channel 211 from the third channel 213, thereby realizing the circulating rolling of the balls 7 in the circulation groove formed by the first channel 211, the second channel 212 and the third channel 213, and adapting to the linear reciprocating motion of the linear bearing.

More specifically, the balls 7 are arranged in the circulating grooves and roll in the circulating grooves in a circulating mode, namely the balls 7 arranged in the concave cavities 21 of the retainer 2 are located in the circulating grooves, so that the balls 7 can roll in the circulating grooves in a circulating mode under the guidance of the circulating grooves, linear reciprocating motion of the linear bearing is adapted, and the structural design is more reasonable.

The novel steel retainer linear bearing provided by the embodiment comprises an outer sleeve 1, a retainer 2, a clamping ring 3, a sealing element 4, a gasket 5, a leaning ring 6 and balls 7, wherein the gasket 5 is arranged between the end parts at two ends of the retainer 2 and the inner wall of the outer sleeve 1, so that when the retainer 2 is pressed by the clamping ring 3, the gasket 5 can generate adaptive deformation, thereby eliminating an assembly gap between the end part of the retainer 2 and the inner wall of the outer sleeve 1 due to the problems of processing precision and the like, meanwhile, the leaning ring 6 is arranged between the end parts at two ends of the retainer 2 and the corresponding sealing element 4, so that when the sealing element 4 applies pressure to the retainer 2, the leaning ring 6 generates adaptive deformation, the pressure of the sealing element 4 to the end part of the retainer 2 is increased, and the problems of abrasion and poor stability caused by relative movement between the steel retainer 2 and the inner wall of the outer sleeve 1 are, the use performance of the linear bearing is improved, and the service life is prolonged.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims (9)

1. A novel steel cage linear bearing, characterized by comprising:

the outer sleeve is arranged in a cylindrical shape, a plurality of bosses protruding towards the inner cavity of the outer sleeve are arranged on the inner wall of the outer sleeve along the axial direction of the outer sleeve, a circle of first caulking grooves are respectively arranged on the inner wall of the outer sleeve and positioned at two ends of each boss, and a circle of second caulking grooves are arranged on the inner walls of the two ends of the outer sleeve and positioned at one sides, away from each other, of the two first caulking grooves;

a plurality of retainers, the retainers are made of steel materials, the retainers are distributed in the inner cavity of the outer sleeve in an annular array, one retainer corresponds to one boss, moreover, both ends of each retainer are bent towards one side of the inner wall of the outer sleeve to form a structure with a hat-shaped section, so that the retainer is provided with a concave cavity, the cavity opening of the retainer is arranged towards one side of the inner wall of the outer sleeve, the boss corresponding to the retainer is positioned in the concave cavity of the retainer, meanwhile, a rolling groove communicated with the inner cavity of the outer sleeve is arranged on the cavity bottom at one side of the concave cavity of the retainer, and the boss in the cavity of the retainer corresponds to the rolling groove on the bottom of the cavity, a third caulking groove corresponding to the first caulking groove is formed in the bent two ends of the retainer and on one side close to the inner wall of the outer sleeve;

the clamping rings are positioned at two ends of the outer sleeve and are arranged in an annular shape, the clamping rings positioned at two ends of the outer sleeve are respectively arranged at the end parts of two bent ends of each retainer, and the clamping rings are positioned at one side of the retainer, which is deviated from the inner wall of the outer sleeve, and press the end parts of each retainer;

the sealing elements are annularly arranged, the sealing elements are arranged at two ends of the inner cavity of the outer sleeve, and the sealing elements are clamped in the second caulking grooves at the two ends of the outer sleeve and tightly abut against the end parts at the two ends of the retainer;

the gasket is arranged in the first caulking groove and tightly propped against the end part of the retainer;

the abutting rings are arranged between the end parts of two ends of each retainer and the corresponding sealing element;

the ball bearings are arranged in the concave cavity of each retainer and can roll in the concave cavity, and one side of each ball bearing extends into the inner cavity of the outer sleeve from the rolling groove of the concave cavity.

2. The novel steel cage linear bearing as claimed in claim 1, wherein the openings at both ends of the outer sleeve are provided with steps, the bore diameter of the region in which the boss and the cage are provided in the inner cavity of the outer sleeve is smaller than the bore diameter of the opening of the inner cavity of the outer sleeve, the first caulking groove is located in the region in which the bore diameter of the inner cavity of the outer sleeve is small, the second caulking groove is located in the region in which the bore diameter of the inner cavity of the outer sleeve is large, and a fourth caulking groove is formed on the step and on the side close to the side where the cage is provided, and is located between the first caulking groove and the second caulking groove, and an opening is formed on the step on the side close to the second caulking groove, and one side of the abutment ring is embedded in the fourth caulking groove.

3. The novel steel cage linear bearing as claimed in claim 2, wherein each of the two ends of the cage has a locking hole, and a plurality of positioning blocks corresponding to the locking holes are respectively disposed at two ends of the small-diameter region in the inner cavity of the outer sleeve, and the positioning blocks extend inward from the step at the end of the outer sleeve in the axial direction of the outer sleeve, and one of the positioning blocks corresponds to one of the locking holes of the cage.

4. The novel steel cage linear bearing as claimed in claim 3, wherein one end of each positioning block extending inward is located between the first caulking groove and the fourth caulking groove, and the two third caulking grooves on each cage are respectively located on the sides of the two clamping holes close to each other.

5. The novel steel cage linear bearing as claimed in claim 4, wherein the abutting ring is provided in plurality, and one abutting ring is provided at each of both ends of the cage and at both ends of the clamping hole.

6. The new steel cage linear bearing of claim 5, wherein the abutment ring is provided in a "U" shape in cross section, the notch of the abutment ring is provided toward the end side of the cage, and the end of the cage protrudes into the notch of the abutment ring.

7. The novel steel cage linear bearing of claim 1, wherein both ends of the boss are arranged in an inclined plane, and the longitudinal section of the boss is in an isosceles trapezoid shape.

8. The novel steel cage linear bearing of claim 1, characterized in that the space between the boss and the rolling groove forms a first channel, a second channel is formed between the side of the cage which is not provided with the rolling groove and the inner wall of the outer sleeve in the cavity of the cage, the length of the boss is smaller than that of the cavity of the cage, a third channel is formed between the two ends of the boss and the cavity of the cage, and the two ends of the first channel and the second channel are communicated through the third channel and form a circulation groove.

9. The new steel cage linear bearing of claim 8 wherein said balls are disposed within said circulation grooves and roll cyclically within said circulation grooves.

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